Division 3.3.3 Reporting interval of information transmission
United Kingdom
The different information types of Inland AIS messages shall be transmitted with different reporting rates.
The reporting rate for dynamic information can be switched between autonomous mode and assigned mode for moving vessels in inland waterway areas. The reporting rate can be increased up to 2 seconds in assigned mode. The reporting behaviour shall be switchable from an AIS base station (via AIS Message 23 for group assignment or Message 16 for individual assignment) and by commands from external ship-borne systems, via IEC 61162 interface as defined in Appendix B.
For static and voyage related the reporting rate shall be 6 minutes, on request, or if information is amended.
Following reporting rates shall be applicable:
| Static vessel information: | Every 6 minutes, on request or when data has been changed |
| Dynamic vessel information: | Depends on navigational status and vessel operating mode, either autonomous (default) or assigned mode, see Table 3.1 |
| Voyage related vessel information: | Every 6 minutes, on request or when data has been changed |
| Number of persons on board: | As required or on request |
| Safety related messages: | As required |
| Application Specific Messages: | As required (to be defined by competent authority) |
Table 3.1
Update rate of dynamic vessel information
| When a mobile station determines that it is the semaphore (refer to Recommendation ITU-R M.1371, Annex 2, § 3.1.1.4), the reporting rate shall increase to once per two seconds (refer to Recommendation ITU-R M.1371, Annex 2, § 3.1.3.3.2). | |
| Shall be switched by competent authority, when necessary. | |
| Vessel dynamic conditions | Nominal reporting interval |
|---|---|
| Vessel status ‘at anchor’ and not moving faster than 3 knots | 3 minutesf1 |
| Vessel status ‘at anchor’ and moving faster than 3 knots | 10 seconds |
| Vessel operating in autonomous mode, moving 0 to 14 knots | 10 seconds |
| Vessel operating in autonomous mode, moving 0 to 14 knots and changing course | 3 1/3 seconds |
| Vessel operating in autonomous mode, moving 14 to 23 knots | 6 seconds |
| Vessel operating in autonomous mode, moving 14 to 23 knots and changing course | 2 seconds |
| Vessel operating in autonomous mode, moving faster than 23 knots | 2 seconds |
| Vessel operating in autonomous mode, moving faster than 23 knots and changing course | 2 seconds |
| Vessel operating in assigned modef2 | assigned between 2 seconds and 10 seconds |
Annotations
Footnotes
- f1
-
When a mobile station determines that it is the semaphore (refer to Recommendation ITU-R M.1371, Annex 2, § 3.1.1.4), the reporting rate shall increase to once per two seconds (refer to Recommendation ITU-R M.1371, Annex 2, § 3.1.3.3.2).
- f2
-
Shall be switched by competent authority, when necessary.